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In-situ stress control in structures

a stress control and in-situ technology, applied in the field of stress compensating techniques, can solve the problems of not having the capability of, for example, in-situ stress compensation excessive, and achieve the effect of preventing material fatigu

Active Publication Date: 2020-01-07
COLLINS ENGINE NOZZLES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively prevents material fatigue by applying controllable stresses, enhancing the serviceable life of structures under complex stress conditions, with embodiments capable of delivering stresses exceeding 1500 MPa and tunable activation temperatures up to 400°C.

Problems solved by technology

Although these methods and approaches are considered reliable, they do not have the capability of, for example, in-situ offsetting excessive local stresses especially in components subjected to very complex stress-strain conditions.

Method used

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  • In-situ stress control in structures
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Embodiment Construction

[0018]Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, an illustrative view of an embodiment of a structure in accordance with the disclosure is shown in FIG. 1 and is designated generally by reference character 100. Other embodiments and / or aspects of this disclosure are shown in FIGS. 2-5. The systems and methods described herein can be used to improve serviceable life of structures exposed to complex stresses, for example.

[0019]Referring to FIGS. 1 and 2, a structure 100 can include a first body 101 formed from a first material (e.g., metal or any other suitable material). Referring additionally to FIGS. 3, and 4, the structure includes a second body 103 disposed on or embedded within the first body 101. The second body 103 includes a shape memory alloy configured to provide a first stress to the first body 101 in a...

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Abstract

In accordance with at least one aspect of this disclosure, a structure can include a first body formed from a first material, and a second body disposed on or embedded within the first body. The second body includes a shape memory alloy configured to provide a first stress to the first body in a first state and a second stress to the first body in a second state. The shape memory alloy is configured to transition from the first and second state as a function of an applied activation energy.

Description

BACKGROUND1. Field[0001]The present disclosure relates to stress compensating techniques, more specifically to selective mitigation or cancellation of excessive stresses in structures, e.g., subjected to complex stress-strain conditions.2. Description of Related Art[0002]There are many rules implemented in the aerospace industry to prevent failures including periodic component inspection or failure specific type of periodic maintenance, as well as sensor technology, continuous monitoring of systems status, and others. These rules and technologies are utilized to manage system health performance affected by environmental, thermo-mechanical fatigue, and other factors that are not always accurately predicted during component design and testing. Although these methods and approaches are considered reliable, they do not have the capability of, for example, in-situ offsetting excessive local stresses especially in components subjected to very complex stress-strain conditions.[0003]Such co...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F03G7/06G01L1/26B64C25/00
CPCF03G7/065G01L1/26B64C25/001
Inventor MIRONETS, SERGEYSTAROSELSKY, ALEXANDERBIANCO, ROBERT
Owner COLLINS ENGINE NOZZLES INC